根据生态渔业系统的需要,结合不同鱼的食性和空间生态位要求,对开县当地常规放养模式的品种和结构进行了合理调整。确定以草鱼为主养鱼,鲢、鳙为配养鱼,由食性相似而价值较高的异育银鲫代替常规的鲤鱼,并套养黄颡鱼,各种鱼的放养比例大致为草鱼45.7%、异育银鲫11%、黄颡鱼0.6%、鲢25%、鳙17.8%。结果表明,该模式单产约7267.5kg/hm2,毛利润约18757.5元/hm2,增产比例为53.7%,经济效益提高143%。 According to the needs of eco-fishery system and the requirements of different fish’s feeding habits and space niche, the varieties and structures of conventional stocking patterns in Kai County were reasonably adjusted. The results showed that grass carp-dominated fish, silver carp and bighead carp were the most common carp with similar feeding value and high value, but the ratio of stocking of various fish was about 45.7 %, Allogynogenetic crucian carp 11%, yellow catfish 0.6%, silver carp 25%, 鳙 17.8%. The results showed that this model yield about 7267.5kg / hm2, gross profit of about 18757.5 yuan / hm2, yield increased 53.7%, economic benefits increased 143%.